Study On Demulsify Of Oil-in-Water Emulsion

Since the Daqing Oil Field has entered the high watery development of work , in the oil field production have produced massive oil-in-water emulsion fluid with high stablity. The largely use of the extraction auxiliary agent has made the component of the output fluid complication,and also made the reinjection sewage's component complication. while breaking the emulsion high effectively and quickly to the output fluid, carrying on effective and the fast emulsion breaking to the reinjection sewage already becomes the noticeable crucial factor that influence of the extraction cost, the quality and the output of the crude oil as well as the control of oil field environmental pollution.In recent years, based on the the limit of irrigation pressure of the oil field reinjection sewage and the reinjection sewage oil content be smaller than 10mg/L, this must carry on effective emulsion breaking processing to the emulsified sewage. In order to reduce the oil field environmental of pollution, It is necessary to carry on emulsion breaking processing extremely before the emissions of the oil-contained sewage to achieve the request of green chemistry ecology.The theory and the practice had proved that, in the emulsion breaking process ,we must control each kind of factor as far as possible, and creat conditions to make the small bubble agglutination to increase, and to accelerate waterdrop subsidence of water-oil separation process.This article studied the development course of demulsifying agent, classified condition as well as oil-in-water emulsion fluid breaking process and mechanism, It also studied the emulsion breaking performance index and the performance evaluation method as well as the standard.we have analyzed the formation reason and stable condition influence factor of the oil-in-water emulsion fluid .meanwhile we synthesized several kind of structure different demulsifying agent, and had carried on the synthesis examination and the evaluation of the demulsifying agent.